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Intangible Assets Including Goodwill - Future Amortization (Details)
$ in Millions
Sep. 30, 2021
USD ($)
Future amortization expense, by year  
Remainder of 2021 $ 645
2022 2,299
2023 1,786
2024 1,541
2025 1,444
Thereafter 5,310
Capitalized software  
Future amortization expense, by year  
Remainder of 2021 171
2022 469
2023 268
2024 74
2025 0
Thereafter 0
Acquired intangibles  
Future amortization expense, by year  
Remainder of 2021 474
2022 1,830
2023 1,517
2024 1,467
2025 1,444
Thereafter $ 5,310